French Infrastructure for Integrated Structural Biology
ANR-10-INSB-05
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ジャーナル: Nature / 年: 2019 タイトル: Structure and autoregulation of a P4-ATPase lipid flippase. 著者: Milena Timcenko / Joseph A Lyons / Dovile Januliene / Jakob J Ulstrup / Thibaud Dieudonné / Cédric Montigny / Miriam-Rose Ash / Jesper Lykkegaard Karlsen / Thomas Boesen / Werner ...著者: Milena Timcenko / Joseph A Lyons / Dovile Januliene / Jakob J Ulstrup / Thibaud Dieudonné / Cédric Montigny / Miriam-Rose Ash / Jesper Lykkegaard Karlsen / Thomas Boesen / Werner Kühlbrandt / Guillaume Lenoir / Arne Moeller / Poul Nissen / 要旨: Type 4 P-type ATPases (P4-ATPases) are lipid flippases that drive the active transport of phospholipids from exoplasmic or luminal leaflets to cytosolic leaflets of eukaryotic membranes. The ...Type 4 P-type ATPases (P4-ATPases) are lipid flippases that drive the active transport of phospholipids from exoplasmic or luminal leaflets to cytosolic leaflets of eukaryotic membranes. The molecular architecture of P4-ATPases and the mechanism through which they recognize and transport lipids have remained unknown. Here we describe the cryo-electron microscopy structure of the P4-ATPase Drs2p-Cdc50p, a Saccharomyces cerevisiae lipid flippase that is specific to phosphatidylserine and phosphatidylethanolamine. Drs2p-Cdc50p is autoinhibited by the C-terminal tail of Drs2p, and activated by the lipid phosphatidylinositol-4-phosphate (PtdIns4P or PI4P). We present three structures that represent the complex in an autoinhibited, an intermediate and a fully activated state. The analysis highlights specific features of P4-ATPases and reveals sites of autoinhibition and PI4P-dependent activation. We also observe a putative lipid translocation pathway in this flippase that involves a conserved PISL motif in transmembrane segment 4 and polar residues of transmembrane segments 2 and 5, in particular Lys1018, in the centre of the lipid bilayer.
名称: Probable phospholipid-transporting ATPase DRS2 / タイプ: protein_or_peptide / ID: 1 詳細: D560 described by Aspartate beryllium trifluoride (BFD) engineered C-terminal GGGG-LVPRGS-BAD-tag Residues 1-104 are removed by proteolysis with thrombin Residues 1364-1460 are removed after ...詳細: D560 described by Aspartate beryllium trifluoride (BFD) engineered C-terminal GGGG-LVPRGS-BAD-tag Residues 1-104 are removed by proteolysis with thrombin Residues 1364-1460 are removed after cleaving of the purification tag by thrombin コピー数: 1 / 光学異性体: LEVO / EC番号: P-type phospholipid transporter